monopteros

noun, plural mo·nop·te·roi [mo-nop-tuh-roi, moh-] /mɒˈnɒp təˌrɔɪ, moʊ-/.

1. monopteron.

noun plural -teroi (-təˌrɔɪ) or -tera (-tərə)

1. a circular classical building, esp a temple, that has a single ring of columns surrounding it